This National Marker Company sign instructs workers or technicians to wear safety glasses while using the equipment. It can be used at an industrial unit, plant or factory to ensure eye protection while working. The legend âCAUTION - WEAR SAFETY GLASSES WHEN USING EQUIPMENTâ is printed in legible font to give more readability to the message. The graphic of a head wearing safety glasses makes the sign much easy to understand. It is UV resistant, chemical resistant and graffiti proof, and has yellow text on black base and black text on yellow base. The rectangular caution sign complies with OSHA standards and has NMC Sign Muscle coating to protect the text and graphic against fading, scratches, scuffing, mold, and moisture.